The biggest news at Square-Enix's private party event, dubbed DKΣ3713, was the Final Fantasy XIII playable demo that will be included with next year's Blu-Ray release of "Final Fantasy VII: Advent Children Complete." Some believed the third Kingdom Hearts entry would be announced, but that never happened...perhaps they've decided to wait until the Tokyo Game Show.
According to the latest Official PlayStation Magazine issue that just hits retailers this week, Square-Enix will most certainly present Kingdom Hearts III for the PlayStation 3 at TGS 2008. There's no way to misinterpret the statement, even though it is listed under the "Rumors" section: "Kingdom Hearts III is currently in development as a PS3 exclusive and will be announced at TGS." Many sources have been saying we should expect KHIII for the PS3 at some point, but not a one has been able to provide us with anything concrete in the way of evidence. And we can't exactly turn to Square-Enix; they're about as forthcoming with news as Quantic Dream was for Heavy Rain before the Leipzig unveiling. So chances are, until October rolls around, we'll never be able to confirm if this rumor is true.
But it certainly should get the attention of PS3 owners, at the very least. We haven't had many RPGs - if any - and Kingdom Hearts III would be an absolutely gigantic announcement. Also bear in mind that there wasn't any talk about a 360 version...this bad boy could be yet another top-notch PS3 exclusive.
http://www.psxextreme.com/ps3-news/3700.html
I've never actually played a Kingdom Hearts game, but I hear they're very good. Plus I love my RPG's so if this turns out to be true it will be a must buy.